Gaya APA
Principles of Economics Vol. 1 Part 1-6 Ch. 1-20. (2016).
Amerika:
Cengage Learning.
Gaya Chicago
Principles of Economics Vol. 1 Part 1-6 Ch. 1-20.
Ed. 8.
Amerika:
Cengage Learning,
2016.
.
Gaya MLA
Principles of Economics Vol. 1 Part 1-6 Ch. 1-20.
Ed. 8.
Amerika:
Cengage Learning,
2016.
.
Gaya Turabian
Principles of Economics Vol. 1 Part 1-6 Ch. 1-20.
Amerika:
Cengage Learning,
2016.
.